New insights concerning dimension-eight effects in weak decays

Details New insights concerning dimension-eight effects in weak decays New insights concerning dimension-eight effects in weak decays

2000-12-06

arxiv.org/abs/hep-ph/0012072v1

Int.J.Mod.Phys. A16S1C (2001) 1228-1230

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, talk presented at the Division of Particles and Fields Meeting, DPF 2000, Columbus, Ohio, Aug. 2000

Scientific paper

10.1142/S0217751X01009387

Most past work on weak nonleptonic decays has mixed dimensional regularization in the weak operator product expansion with some form of a cutoff regularization in the evaluation of the matrix elements. Even with the usual technique of matching the two schemes, this combination misses physics at short distance which can be described by dimension eight (and higher dimension) operators. I describe some recent work with V. Cirigliano and E. Golowich which clarifies these effects and provides a numerical estimate suggesting that they are important.

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